I have a few webcams sitting around and I tried recording video using GUVCview, VLC, Cheese, and a few others and they all have a terrible background noise, and/or the audio is out of sync...how can I fix this issue, is this a bug in pulseaudio?

Screencasting works sometimes, but it usually crashes after about 5 minutes of recording....which is a serious problem!

1 Answer
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I usually use ffmpeg from the command line to either do screencasting or even to record video from my embeded webcam. It can be ressource greedy depending on what type of video you want to create but it's always of very good quality!
For example to record your desktop you can use:
ffmpeg -f x11grab -s wuxga -r 14 -i :0.0 -b 800k -an -vcodec mpeg4 screencast.avi